Radiocondenser



Feb. 9 1926.

C. HORTON RADIOCONDENSER Filed Sept. 5. 1924 2 Sheets-Sheet l INVENTOR CHARLES HORTON" flfl/vzsiL/flwwm.

ATTORNEY Feb. 9 1926.

' C. HORTON BADIOCONDENSER Filed Sept. 5, 1924 2 Sheets-Sheet 2 INVEN TOR CHARLES Horn-on M; El 12; m

ATTORNEY Patented Feb. 9, 13926.

UNITED STATES PATENT QFFlCE.

CHARLES HORTON, OF RIDGEFIELD PARK, NERV JERSEY, ASSIGNOF TO DUBILIER CONDENSER 8c RADID CGRPORATION, GF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

EADIOCONDENSER.

Application filed September 3, 1924.

To all whom it mag; concern:

Be it known that 1, CHARLES Honrort, a citizen of the United States, residing llidgelield Park, in the county of B81 and State of New Jersey, have inve1 certain new and ufei ul li'nprovcincnts in Radioconderscrs, or" which the following is a specification.

This invention relates to tired condensers particularly to that type of lined condenser suitable for radio reception.

A well-known condenser consists 01" a series of thin dielectric sheets interleavQd with sheets of a conductive material, such as copper or tin foil. The condenser stack as thus formed is enclosed between two insulating covers and the whole structure l estened together at opposite ends by metallic U-shaped clips having opening-s therein for the passage of rivets. Usually a log is ach-cd to each U-shaped clip and the rivets fastened over the clips and the lugs, for greater ease in connecting the con lenser to an electric circuit.

Frequently when the U-shaped clips to *ced'over the ends of the condensstack and the insulating covers, the toil which project and are "folded down a the outer face of one ot the covers, are more or less injured by the scraping action of the clip as it is being moved into position, Sometimes the foil sheets are so ha as to require the scrapping of the imp condenser without any appreciable of the parts thereof.

A second trouble is encountered when lug is placed on top of each clip and h position by the operator while a rivet s inserted therethrough, preparatory to scouring the whole condenser a sembly together. in this step the operator has three parts to assemble; the condenser, the lug and the rivet, and the operation consumes considerable time.

Among the objects of the invention, are to provide a new form of clip for enclosing the opposite ends of the assemblecL coi'idcnser pack, to render more perfect the contact between itself and the toil conductors which project'trom the stack and facilitate a rapid assembly of t ne condenser without inflicting damage or lessening the eiiiciency ot the assembled device.

m L Ll1lS invention anns more particularly to Serial No. 735,5Q2.

*ovide an improved form of clip which a better and more complete surcontact iv1th the conductive sheets 111 the f the losses accompanying the use of high frequency currents.

it i further contemplated to provide these -ps with bent over portions for the protection of the toil sheets where the latter sheets a re exp ed.

Another obj set of the invention is to prov' is clip which shall have associated therewith any one of a variety of lugs for attachthe assembled condenser to the other iccs in the circuit, thereby decreasing the "inher of parts necessary to produce a service-able condenser.

is further contemplated to provide a to clip which shall have the necessary U-shaped formation to enclose the condenser, only when the two parts of which it is formed are broughttogether on the assembled condenser. This feature obviates the necessity of providing several types of clips of ferent sizes, to accommodate the various thicknesses of the condensers of different capacity, in present day use.

Still more, it is aimed to provide a clip which may he form d bow-shaped in part, so as to exert a pressure upon the entire condenser when completed. This result tends to reduce the air pockets in the condenser and also to elim' nate loose connections which cause considerable loss of eiiiciency in condensers.

A final object is indicated in the provision of a compound clip of the if" V which may 1e assembled with the usual rivet in position in one part of the .ie before the clip is put on the condenser thus making possible expeditious performance of the linal step in the assembling of the condensers by automatic or seini-auton'iatic machinery.

These and other objects and advantages will appear from the subjoined detailed description of the Oil'lbOClllllQlltS of the invention illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of a form of the clip on a condenser;

Figure 2 is a plan view of a condenser with a clip having a different configuration 01'? the lugs thereon;

Figure 3 is an edge view 9f the clip shown in Figure 2; the condenser hearing it being in side View;

Figure l is a side elevation of the clip and end view of the condenser shown in Figure 2;

Figure 5 is a detail side view of the upper section of the clip shown in Figure 2;

Figure 6 is a plan view of still anothertype of condenser and clip with a different configuration of the connecting lugs thereof;

Figure 7 is a side view of the clip shown in Figure 6, the condenser being in end clevation;

Figure 8 is a plan view of a still further modification of the clip, in which two lugs of different configuration are connected integrally each with one section of the clip; the condenser being in top plan;

Figure 9 is a front elevation of the clip shown in Figure 8; and

Figure 10 is a perspective view of a modified clip adapted for making connections with the other members of the circuit and also with a resistance of the tubular type a grid leak; the condenser bein seen from one end.

The same characters denote the same parts wherever they are shown.

The condenser is built up of dielectric layers 1, such as mica sheets, alternating with thin layers of conductive material 2, such as tin or copper. As is clearly shown in Figure 1 the sheets of conductive material project beyond the ends of the dielectric material as at 3, and usually are narrower than said dielectric sheets, as shown at 4. The assem' bled'dielectric and foil layers are enclosed between covers 5 of insulating material, as bakelite, to furnish the required stiffness and backing for the layers therebetween. The complete stack or body of the condenser may be regarded as including not only the layers 2 and dielectric 3, but also the covers 5.

As shown clearly in Figures 1 and 3, the conductive sheets of foil which project from between the layers of dielectric material are folded over upon one face of one of the insulating covers at each end of same, as at 6, being held in position by the pressure produced by the clips 7.

The clips 7 which form the main feature of the invention herein disclosed are composed of two independent sections 8 and 9; which, when united by the passage of a rivet, such as an eyelet 1O therethrough, combine to form a substantially U-shaped clip, (see Figs. 1, 2 and 3). It is also to be understood that the shape of the condenser pack need not be as shown, since the clip sections may be constructed to suit any configuration of condenser.

As indicated in Figure 1 the sections 8 and 9 are made of substantially angleshaped flat plates, each consisting of a porthe portions 11".

tion 11 bent to engage the end of the condenser stack, and a portion 12 to be in contact with the outside surface of one cover 5. By this arrangement, the sections when placed in inverse relationship upon one end or side of the condenser stack, will form a U-shaped clip, or clip of other shape corresponding to the form of the condenser.

Upon each lower section 8, with reference to Figure 1, there is integrally formed a connecting lug 18 which can be of any desired outline to allow for the proper location and connection of the condenser to the apparatus with which it is to be utilized. This lug may be bent into any angularly otl'sct position in order to allow the utmostconvenience in connecting the condenser in circuit.

As shown in Figure 1, each lug 13 which has an opening 13 therein, is substantially parallel to the plane of the insulating cover 5 and the surface 12 of the clamp section 8v The two sections 8 both have their portions 12 in contact with one and the same cover 5, and the sections 9 have their portions 12 in contact with the other cover 5. As the sections are disposed on the stack,

the lugs 13 are adjacent diagonally opposite corners of the stack; and so are the portions 11 of the two sections 8 and the port ons 11 of the two sections 9.

In the modificat on shown in Figures 3 and 4; inclusive, each section 8 of the clips at the opposite ends of the condenser has an upstanding arm or lug 14, in a plane perpendicular to the plane of the adjacent cover 5, to permit an ordinary grid, such as for the connection of a tubular leak, to be mounted on the condenser. The lugs 14 are connected to the portions 11 by portions 15, and extend obliquely, as at 16 and 17, towards the middle of the condenser so as to locate the contact openings 141 in the lugs 16 and 17 at the opposite ends of a straight line along the center of the condenser, above the rivets 10.

The structure shown in Figures (3 and 7 illustrates a further modification of the arrangement of the sections 8 and 9 whereby a lug 18 protruding at right angles from each section 8, at the opposite ends of the condenser, is located substantially at the center of the clamp 7. This necessitates a change in the configuration of the sections 8 and 9 so that the portion 11 is narrower and the portion 11 of the section 8 is relatively wider; and the arms or lugs being united to The difference in the width of the respective sections however, does not in any way affect the utility or efficiency of the clip, since the two sections 8 and 9 when assembled will form a tight clip for enclosing the opposite ends of the con denser stack.

In Figures 8 and 9 another form of clip is shown wherein the lugs 19 and 20 protrude from the same side of the condenser,

both lugs being connected by the portions- 21 from the condenser stack to the ends of the portions 12 of the sections 8, en ages the same cover 5. In this arrangement each section 8 is similar to that shown in Figures 1 to 4 inclusive, the only variance being indicated in the location of the lugs 19 and 20 on the sections 9 of the clip.

The lugs 19 and 20 on one side of the condenser malre possible connection to apparatus that requires the two terminals of the condenser to be on the same side. It might be further noted that the slots in the lugs 19 and 20 make possible a range of adjust-ability for the connections of the term nals of the cond nser to the other devices.

Figure 5 illustrates a bend in the portion 12 of each section of the clip to cause well defined pressure throughout the entire condenser and to prevent losses due to air pockets, which greatly lower the etlicicncy of the condenser.

In Figure 10, there is shown a further modification of the section 8 which has a lug 2a supplementing a lug 25, the supplementary lug 24: having an adjustment slot 30, while the lug 25 has the aperture 13 only. By this arrangement varied connections may be made; as for instance, the attachment of the condenser to a transformer and the simultaneous use of a grid leak resistance.

In this above described arrangement of sectional clips the separate operation of positioning the eyelets 10 is obviated. The eyelet may be inserted in one section, as the section 9, before the eyelet is inserted in the condenser. N hen the section 9 is placed on the end of the stack, and the section 8 is placed in proper relation thereto, it is only necessary to exert pressure expand the ends of the rivets 10, thus securing the sections to the stack and completing the condenser.

It is understood, of course, that the sheets 1 and 2, and the covers 5 are perforatet to allow the rivets to pass through the stack, and hold the sections 8 and 9 on the oppos te faces thereof. Part of the conductive sheets 2 must make contact with the clip at one end of the condenser and the remaining sheets must make contact with the clip at the other end, and the rivet holding one clip will be out of contact with the sheets 2 whose projecting ends 6 will be in contact with and engaged by the other clip, as by making openings through the sheets 2 in contact with the other clip larger than the diameter of the rivet, as is well known to those skilled in this art.

It should be further understood that inasmuch as each clip 7 is formed of two sec tions 8 and 9, that the present difiiculty encountered when integral U-shaped clips are forced over the ends of the condenser stack, "whereby the projecting ends (9 oi the foils 2 are usually t: 'n or crimped due to the force required to push the tight fitting one-piece U-shapcd clip over the end of the stack, is completely oviated. in the clip 7 illustrated in this application, the sections 8 and 9 are merdy placed upon opposite faces of the condenser stack, the foil ends 6 being covered witho t any tearing or crimping. V hen the eyelet have been riveted, the compression is permanent due to the pressure applied in the bend and the U-shaped co gurarion of tegral lug for connecting purposes is permanently obtained.

It is of course obvious that various changes and modifications ma be made to the details of construction above described without departing from the spirit of this invention as set forth in the appended claims.

I claim as my invention:

1. An electrical condenser comprising a stack having clips thereon, each clip including separate sections secured to the stack, one section of each clip directly engaging only one of the faces of the stack and having portion bent over only the adjacent side of said stack, and the other section directly engaging only the opposite face of the stack and having a portion bent over only the same side thereof.

2. An electrical condenser comprising a stack having clips thereon, each clip including separate sections secured to the stack, one section of each clip directly engaging only one of the faces of the stack and having a portion bent over only the adjacent side of said stack, and the other section dircctly engaging only the opposite face of the stack and having a portion bent over only the same side thereof, said bent portion of each section being relatively smaller than the iaind f said section.

. cal condenser comprising a having clios thereon, each clip includo ing sci arate sections aflixcd to the stack, one

' of each clip directly engaging only one of the faces of the stack, and the other section directly on -aging only the opposite face thereof, at least one section of each clip ha a portion bent with respect to the renn nder of the section over only the adjacent side of the stack.

4-. An electrical condenser comprising a stack hating clips thereon, each clip includ ing separate sections affixed to the stack, one section of each clip directly engaging only one of the faces of the stack, and the other *ection directly engaging only the opposite face thereof, at least one section of each clip the clip including the inw cent side of the stack, each of said bent portions being relatively smaller than the remainder ot' the sections associated therewith.

5. An electrical condenser comprising a stack having clips thereon, each clip including separate sections, one section of each clip having a portion directly engaging only one of the faces of the stack and having another portion bent over only the adjacent side of said stack, the other section having a similar portion directly engaging only the opposite face of the stack and having another portion bent over only the same side thereof, said bent portions of each clip being smaller than the firstsnained portion and being disposed adj acent each other.

6. An electrical condenser comprising a stack havin clips thereon, each clip including separate sections, one section of each clip having a portion directly engaging only one 01": the faces of the stack and having another portion bent over only the adjacent side of said stack, the other section having a similar portion directly engaging only the opposite lace of the stack and having another portion bent over only the same side thereof, one of the bent over portions of each clip of the condenser having a connecting lug projecting therefrom.

7 An electrical condenser comprising a stack having clips thereon, each clip including sections, each section of each clip having portion directly engaging only one face of the stack, and each section of each clip also having a portion bent to extend over only one and the same side of the stack, the bent over portion being relatively small and the first-named portion having a bend therein intermediate its ends; and means to secure the clips to the stack and press the firstnained portions thereof flat against the outer faces thereof.

In testimony whereof I affix my signature.

CHARLES HORTON. 

